Henley Festival: 13 things you'll see at the 'posh Glastonbury'
Revellers in ball gowns and dinner jackets, turning up on board £200,000 boats to dance and party while knocking back magnums of vintage champagne? It can only be the extraordinary Henley Festival, the high-end musical extravaganza that's a sort of Glastonbury-on-Thames for the (very) well heeled. We sent Emma Earnshaw along to see what it was like.